all: add a Github Workflow to run tests (#307)

.github/workflows/tests.yml

@@ -0,0 +1,39 @@
+# Copyright 2021 The Wire Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Wire Tests
+on: [push, pull_request]
+jobs:
+  build:
+    strategy:
+      matrix:
+        # Run most recent version of Go on all supported OSs.
+        # When updating Go versions, also edit the version test in
+        # internal/runtests.sh.
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        go-version: 1.17.x
+        # Also run previous version of Go, but only on Ubuntu.
+        include:
+          - os: ubuntu-latest
+            go-version: 1.16.x
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Test
+          'internal/runtests.sh'